<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link rel="stylesheet" href="game.css" />
  </head>
  <body>
    <div class="container">
      <div id="score"></div>
      <canvas id="game" width="375" height="375"></canvas>
      <div id="introduction">按住鼠标伸出一根棍子</div>
      <div id="perfect">双倍得分</div>
      <button id="restart">重玩</button>
    </div>
  </body>
  <script src="game.js"></script>
</html>